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How To Fix CSF Error open3: exec of /usr/bin/systemctl is-active firewalld failed

As we know that since version 13.05 was released to the public, CSF (ConfigServer Security & Firewall) has fully supported VestaCP with user interface integration. However, if you configure VestaCP and CSF on the Ubuntu 18.04 LTS server you might get the same error message like this when restarting the CSF.: [email protected]:/usr/local/src/csf# csf -r Flushing …

How To Fix 8 Common Errors on CSF (ConfigServer Security & Firewall)

ConfigServer Security & Firewall (CSF) is one of the most advanced firewalls available for Linux servers. It can be easily installed on almost all Linux-based operating systems, including RedHat Enterprise Linux (RHEL), CentOS, CloudLinux, Debian, Ubuntu, Fedora, and OpenSUSE. In addition, almost all types of virtual private servers are also compatible with CSF Firewall like …

How To Install CSF Firewall on VestaCP (RHEL/CentOS & Debian/Ubuntu)

VestaCP has a built-in default firewall with iptables and fail2ban. You will find it when you run VestaCP with Linux operating systems including RHEL and CentOS. However, we can exclude iptables and fail2ban in the VestaCP installation command script (ADVANCED INSTALL SETTINGS). Instead, we can replace iptables and fail2ban with CSF Firewall (ConfigServer Security & …